Lock and latch



Aug. 22, 1933. N, B, HURD 1,924,069

LOCK AND LATCH Fi led March 2, 1933 INVENTOR ATToRNEYan of the lock case.

Patented Aug. 22, 1 9 33 UNITEDSTATES 1,924,069 LooK AND LATCH Norman Hurd, Newington, Conn., assignor to The American Hardware Corporation, New Britain, Conn., a Corporation of Connecticut Application March 2, 1933.

12 Claims.

My invention relates to improvements in looks and latches, particularly of' that type in which the latch-bolt or dead-bolt, or both, may be operated by means of the so-called cylinder lock that is detachably connected to the outdoor side My object is to provide means whereby when the cylinder lock is attached to thelock case by the usual screw threaded connection, it may be locked thereto in such a manner that it cannot be removed therefrom, excepting by the use of a special means, such as a special key different from the usual pass key or master key. By thus guarding against removal of thecylinder lock from the lock case, excepting by an authorized person holding a proper key, certain methods of unlawful entry are prevented.

In the drawing Fig. 1 is a side elevation relatively enlarged showing a cylinder lock as applied to a portion of a lock case and locked against removal, certain portions being in section;

Fig. 2 is an elevation of the parts shown in Fig. 1 excepting the roll-back, and viewed from the right hand side;

.Fig. 3 is a view similar to Fig. 1, showing'cer' tain parts in a difierent position and showing a different key from that shown in Fig. 1;

Fig.4 is an elevation similar to Fig. 2 of the parts in the position shown in Fig. 3;

Fig. 5 is a section on the line 5-5 of Fig. 1, certain parts appearing in elevation;

Fig. 6 is a perspective view of a detail.

I I have shown and shall describe only one particular form of my invention, and I desire it to be understood that it is susceptible of various modifications'without departure from the spirit or scope. thereof.

1 represents a portion of an ordinary lock case in which there is the usual threaded opening for receiving the usual threaded end of a cylinder lock body 2. It may be assumed that the lock case 1 is to contain the usual latchbolt or dead-bolt, or both, with the well known appropriate parts associated therewith, and which are actuated by means of the usual rollback 3 or spindle such as carried by or connected to the rotatable plug 3 of the cylinder lock. Such parts are too well known to require illustration or detailed description. The body 2 of a cylinder lock is threaded at its rear to screw the plug, operable by the regular pass or masterkey 5. 4 is a special tumbler that performs a special key.

Serial No. 659,254

'7 is a sleeve rotatably mountand normally in line with, the tumbler 4 and 7 its follower. 8is a coacting sleeve surrounding the plug just to the rear of the sleeve 7. 7' is a shoulder on the edge of the sleeve '7 extend" ing toward the sleeve 8 and into a recess in the latter, said recess being long enough so that the sleeve 7 may have slight independent rotary movement relatively to sleeve 8 for the purpose later described. .8 is a nose on the periphery of the sleeve 8. At the back of the body 2 is a guideway in which I locate a slide 9, which overstands the sleeve 8, and which constitutes one form of lockingvdevice for locking thecylinder lock body 2 to the lock case 1 so that it may not be unscrewed therefrom and removed, excepting it is first released by the use of said 107is a spring which normally urges the locking slide 9 toward the sleeve 8. The inner end of the slide 9 has a shallow notch 9 and a deeper notch 9". The sleeve 8 may be turned so thatthe nose 8 may be shifted into one or the other of said notches. When the nose stands in the deep notch 9', the locking device 9 will be retracted ,to itsunlocking position, whereas when it stands in the shallow notch 9, the end of the slide will project outwardly. into a notch or groove 1 in the threaded. edge of the passage through the lock case so that the cylinder lock body cannot be unscrewed and detached from said case at such a time. On the inside of the case 1, I may cast a boss 1" that may have a long groove to receive the end of the locking device so that the cylinder lock body may be screwed into the lock case more or less whereby said cylinder lock may beadjusted to doors of different thicknesses. When the regular key 5 is used, it will not shift the tumbler 4' into the passage in sleeve 7, and consequently said sleeve will-be held against turning in the body 2 by the end of'the follower for the tumbler 4. The plug 3 may be turned" by a regular key 5 to operate. the bolt mechanism within the lock case 1,-but that particular key will haveno effect on the locking device 9. The special key 6 is so bitted and shaped at its inner end that it may extend ciently into the sleeve 7 to engage and lift the tumbler 4 into the passage in the sleeve 7' and couple it to the plug, at the same time displacing the follower therein. This leaves said sleeve 7 free to be turned to the right or left with the plug. IBy turning this sleeve sun; ciently, the shoulder '7 will engage with the shoulder at one or the'otherend of the reci in the sleeve 8 so that by continui to tur 11 said key 6 in the same direction, the-sleeve 8 will be turned so as to move the noses" in a.

corresponding direction. When turned in one direction, the nose 8 will be moved toward into the shallow notch 9, thus projecting the locking slide 9 outwardly to engage withthe loch,

- of the sleeve 8, to permit said key to be with drawn from the plug. In the particular form shown, the main function of the special key 6 is to merely control the locking device 9, but in this case it must be so bitted that it will operate the locking tumblers to release the plug 3, to permit the latter to be turned in one di rection or the other for the aforesaid purpose. Ordinarilyycylinder lock bodies when secured to lock cases are held against looseness or turning therein by means of the well known long screw'll carried by the lock case, the outer end of which (not shown) is accessible at the face-- platethereof, while the inner end extends a longitudinal groove 2 in the side of the body 2. Manifestly, this alone will not prevent the cylinder look from being removed from the case 1 when the door is opened because access may then be had to said screw. Since cylinder locks v are sometimes removed for unlawful purposes,

it is highly important to prevent suchremoval by any unauthorized person. The presentinvention makes the removal of the cylinder look from the lock case impossible, since the locking device 9 is operableonly by the use of a special key, and the mere backing off of the screw 11 is insufficient to fully release the cylinder loci; so that it may be turned.

I claim: I

1. A cylinder lock body threaded to engage by rotation a threaded opening in a lock case, a rotatable plug in said body, lockingmeans carried by said body to engage said'case to prevent the rotation of said cylinder lock therein, said locking means being operableby a special key insertable in said plug, said cylinder lock being operable by a different key insertable in said plug and without operating said locking means.

2. A lockyincluding a body threaded at its rear for attachment by rotation in a threaded opening in a lock case, and also including a rotatable plug and tumblers therefor, a locking device carried by said body and movable to a position to hold said body from rotation relatively thereto, said tumblers being operable by one key to permit rotation of the plug for normal lock operation only and being operable by a difierent key for operating said locking device to permit said cylinder lock to be rotated in said case and removed therefrom.

3. Means for locking a cylinder look to a lock case comprising a lock body screw threaded at its rear, and attachable and detachable to and from said case by rotation, a locking device adjacent the rear end and projectible beyondthe side thereof to engage said case to prevent rotation, a rotatable member in said body, means to couple said member with said device, said member being operable for one purpose by one key independently of said coupling means, and being operable by a different key for another purpose dependently with said coupling means.

.4. In a cylinder lock, a lock body attachable by rotation to a lock case, a laterally movable locking device therefore at the rear of the cylinder lock for engagement with said case to prevent rotation of said body'therein, a rotatable plug, tumblers therefor, said tumblers being controlled and said plug being operable for door locking purposes by one key without operating said locking device, said tumblers being also controlled and said plug being operable by a different key for operating said locking device.

5. Means for attaching a cylinder lock to a loci: case by rotation comprising a lock body screw threaded at its rear, a locking device adjacent the rear end and projectible beyond the side thereof into engagement with said case to prevent rotation, a rotatable member in said body, means to couple said member with said device, said member being operable for one purpose by one key independently of said coupling means and being operable by a different key for another purpose dependently with said coupling means, one of said tumblers comprising part of said coupling means.

6. Means for looking a cylinder lock to a lock case comprising, a body screw threaded at its rear to be attached to a lock case in a threaded opening in the latter, a rotatable plug in said body, tumblers and followers therefor, two coacting sleeves on said plug with means to permit limited rotary movement of one sleeve relatively to the other, one of said followers normally holding one sleeve against rotation with said plug, one of said tumblers being operable by a special key to displace said last mentioned follower and connectsaid sleeve to said plug for rotation, a locking device, the said other sleeve coacting therewith to move the same when the first sleeve rotated with said plug.

7. Means for looking a cylinder lock to a lock case comprising, a body screw threaded at its rear to be attached to a lock case in a threaded opening in the latter, a rotatable plug in said body, tumblers and followers therefor, two coacting sleeves on said plug with means to per mit limited rotary movement of one sleeve relatively to the other, one of said followers normally holding one sleeve against rotation with said plug, one of said tumblers being operable by a s ecial key to displace said last mentioned follower and connect said sleeve to said plug for rotation, a locking device, the said other sleeve coacting therewith toproject the same when the first sleeve is rotated with said plug, and a spring to retract said locking device.

8. In a cylinder look, a body attachable to a door by rotation, a rotatable plug in said body, tumblers therefor, a locking device at the rear of said body to prevent rotation of said body in said door, coupling means between said plug and said locking device, said'plug being operable by one key without operating said locking device, said coupling means being operable by a different key whereby movement of said plug will be transmitted to said locking device to operate the same.

9. In a cylinder look, a body attachable to a door by rotation, a rotatable plug, tumblers therefor, a locking device at the rear of saidbody to prevent rotation of said body in said door, coupling means between said plug and said locking device, said plug being operable by one key without operating said locking device, and being operable by a difierent key whereby movement of said plug will be transmitted to said locking device to project the same.

10. A look including a body threaded at its rear for attachment by rotation in a threaded opening in a lock case, and also including a rotatable plug with tumblers therefor, and a locking device carried by said cylinder body for engagement With the lock case to hold said body from rotation relatively thereto, said tumblers being operable by one key to permit rotation of the plug for door locking purposes only and being operable by a different key to permit rotation of said plug for the purpose of operatout actuating said means.

12. In a structure of the character described, a cylinder lock, means toattach the same to and detach the same from a door by a rotary movement thereof, means carried by said cylinder lock and controlled by a key adaptable to said lock and movable in one'direction to prevent rotation and detachment of said lock from said door and in another direction to permit rotation and detachment of said look from said'door.

NORMAN B. HURD. 

